Analysis on the Improvement of Thermal Performance of Phase Change Material Ba (OH) 2 ·8H 2 O

Xiaohui Lu, Xiaoxue Luo, Shibo Cao and Changzhen Zou
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Xiaohui Lu: School of Mechanical and Marine Engineering, Beibu Gulf University, Qinzhou 535011, China
Xiaoxue Luo: School of Mechanical and Marine Engineering, Beibu Gulf University, Qinzhou 535011, China
Shibo Cao: School of Mechanical and Marine Engineering, Beibu Gulf University, Qinzhou 535011, China
Changzhen Zou: School of Mechanical and Marine Engineering, Beibu Gulf University, Qinzhou 535011, China

Energies, 2021, vol. 14, issue 22, 1-10

Abstract: Benefitting from the characteristics of a high latent heat capacity and stable phase change behavior, phase change materials have widely received concerns in the field of thermodynamic management. Ba(OH) 2 ·8H 2 O is an ideal phase change material (PCM) in the mid-to-low temperature range, but its large-scale application is still limited by severe supercooling during the nucleation process. In this paper, the experimental analysis and comparison are performed via an Edisonian approach, where Ba(OH) 2 ·8H 2 O is adopted as an original substrate; BaCO 3 , CaCl 2 , NaCl, KH 2 PO 4 , and NaOH are selected as nucleating agents; and graphite is used as a heat-conducting agent. The results show that Ba(OH) 2 ·8H 2 O containing 1.2% BaCO 3 and 0.2% graphite powder has the best performance. Compared with pure Ba(OH) 2 ·8H 2 O, the supercooling degree is reduced to less than 1 °C, the phase change latent heat duration is extended, and the thermal conductivity is significantly improved. Therefore, this study not only provides a reference for the application of Ba(OH) 2 ·8H 2 O, but can also be used as a guidance for other material modifications.

Keywords: phase change; Ba(OH) 2 ·8H 2 O; nucleation; supercooling; latent heat (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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